1. 1 Northern Arizona University Department of Mathematics and Statistics 2014 High School Math Day Face Off Students, start your brain cells!

2. 22 If two fair six sided dice are rolled what is the probability that both roll 5 or higher? [1/9]

3. 33 [1]

4. 4 40% of a given number is 16. What is 45% of the number? [18]

5. 55 [none]

6. 66 [4]

7. 77 [3] What is the greatest common factor of 9, 15, and 24?

8. 8

9. 99 [7]

10. 10 If three standard 6 sided dice are rolled what is the probability that the sum is odd? [1/2]

11. 11 What is the length of the hypotenuse of a right triangle with legs of length 5 and 12? [13]

12. 12 [1]

13. 13 [April 10 th ] On which calendar date was the 100 th day of the year 2014?

14. 14 Which of 3432, 2626, and 1234 are divisible by 4? [3432]

15. 15 [1 and -1]

16. 16

17. 17 [199] The first odd number is 1. What is the 100 th odd number?

18. 18 [2000]

19. 19

20. 20 If two fair six sided dice are rolled what is the probability that at least one rolls 5 or higher? [5/9]

21. 21 [16] What positive number less than 20 is 45 more when its digits are reversed?

22. 22

23. 23 [5200]

24. 24 [1]

25. 25 [1/2]

26. 26 What is the smallest positive integer that has two syllables? [seven]

27. 27

28. 28 [-1]

29. 29

30. 30 [156312 and 126453] Which of 156312, 134572, and 126453 are divisible by 3?

31. 31 [1]